7981281

素因数分解:

$3^3\times 7^1\times {\mathrm{11}}^2\times {\mathrm{349}}^1$

素因数の和:387

約数の個数: 48

約数和(自身を含む): 14896000

約数和(自身を除く): 6914719

約数列:

[1, 3, 7, 9, 11, 21, 27, 33, 63, 77, 99, 121, 189, 231, 297, 349, 363, 693, 847, 1047, 1089, 2079, 2443, 2541, 3141, 3267, 3839, 7329, 7623, 9423, 11517, 21987, 22869, 26873, 34551, 42229, 65961, 80619, 103653, 126687, 241857, 295603, 380061, 725571, 886809, 1140183, 2660427, 7981281]

約数ペア:

[(1, 7981281), (3, 2660427), (7, 1140183), (9, 886809), (11, 725571), (21, 380061), (27, 295603), (33, 241857), (63, 126687), (77, 103653), (99, 80619), (121, 65961), (189, 42229), (231, 34551), (297, 26873), (349, 22869), (363, 21987), (693, 11517), (847, 9423), (1047, 7623), (1089, 7329), (2079, 3839), (2443, 3267), (2541, 3141)]